A 31-year-old man was shot to death on the grounds of a Bronx housing development building Monday night, cops said.

The victim was on St. Ann’s Avenue near East 135th Street, on the grounds of the Mill Brook Houses in Mott Haven, at about 11:45 p.m. when someone blasted him in the head and body, police said. He was pronounced dead on scene.

Cops did not immediately have any suspects or information on a motive.